3 ms·

I'd argue not breaking old code has precedence over zero cost abstraction.

• bregma 5y ago
  It's not a contest. They're both fundamental requirements. Mom doesn't like one of them best.
  • gpderetta 5y ago
    But indeed, when the option is between maintaining backward compatibility or further reducing overhead, the C++ committee usually choses the former, at least on the library side. See for example the less then ideal unique_ptr constructor or the invalidation guarantees of the unordered containers.